<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<!--
frame不能写在 body 里面
-->
    <frameset rows="30%,*">

        <frame src="top.html" noresize="noresize">
        <frameset cols="30%,*">
            <frame src="left.html" noresize="noresize">
            <frame src="right.html">
        </frameset>

    </frameset>
</html>